I hate to be dismissive, but I'd rather you didn't, and this is why:
Took me about 5 minutes using INVedit on single player, placing this over my test image. I know I missed out the black border but I don't think that'd improve things much. Glowstone has such an ugly texture and doesn't tile properly - You'd also need at least 3 stacks of it too and that'll take you a year to farm.
(plus it took me about an hour and a half to farm all that pink wool so I'd rather that wasn't removed)